American or Lesser Goldfinch?

I was helping my mom create her first lifelist, mostly from photos, and she was using this as her photo of an American Goldfinch. I think it's a male Lesser, but I'd be happy to be proven wrong for her.

Nope, I was a little unclear there haha. The black on the forehead, coupled with the rest of the plumage (dull, non-breeding body, yellow throat and dull bill) makes it a Lesser. A black forehead alone is not diagnostic.

It would have made it easier to ID if more of it was showing in the photo, esp. its back, snick. The back of a Lesser is always dark compared to an American, which will have a yellow back. (This is comparing the males as shown)
There is enough to ID it as a Lesser, however. Yours has a dark stout beak...an American Goldfinch has a pinkish or yellow bill that isn't as stout. Also, a Lesser has a black "cap" covering its head, whereas an American has the black forehead as in the photo BigOly posted above.